CVE-2026-6539

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Source

https://cve.org/CVERecord?id=CVE-2026-6539

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6539.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-6539

Published

2026-04-30T20:31:54.961Z

Modified

2026-07-28T04:03:12.019718182Z

Severity

4.6 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

Notepad++ 8.9.3 Format String Injection via nativeLang.xml

Details

Notepad++ 8.9.3 contains a format string injection vulnerability in the Find Results panel handler that allows attackers to cause denial of service and information disclosure by crafting a malicious nativeLang.xml language pack file. Attackers can distribute a poisoned language pack through community channels that triggers format string interpretation when a user performs search operations, leading to access violations and potential leakage of stack or register contents.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/6xxx/CVE-2026-6539.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "8.9.4"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "fixed": "8.9.4"
                }
            ],
            "source": "CPE_FIELD"
        }
    ],
    "cwe_ids": [
        "CWE-134"
    ],
    "cna_assigner": "VulnCheck"
}

References

Affected packages

Git / github.com/notepad-plus-plus/notepad-plus-plus

Affected ranges

Type

GIT

Repo

https://github.com/notepad-plus-plus/notepad-plus-plus

Events

Introduced

8452101a4b349c46b19af7d7010588d3b540294f

Last affected

8452101a4b349c46b19af7d7010588d3b540294f

Database specific

{
    "extracted_events": [
        {
            "introduced": "8.9.3"
        },
        {
            "last_affected": "8.9.3"
        }
    ],
    "cpe": "cpe:2.3:a:notepad-plus-plus:notepad\\+\\+:8.9.3:*:*:*:*:*:*:*",
    "source": "CPE_STRING"
}

Affected versions

8.*

8.9.3

v8.*

v8.9.3

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-6539.json"